var getTimeStr = function(){
		var result = "";
		var da = new Date();
		var hournow=da.getHours();
		if(hournow<8){
			result="早上";
		}else if(hournow<12){
			result="上午";
		}else if(hournow<=13){
			result="中午";
		}else if(hournow<=18){
			result="下午";
		}else if(hournow>18){
			result="晚上";
		} 
		result = result + "好，";
		return result;
	}

Date.prototype.Format = function (fmt) { //author: meizz 
    var o = {
        "M+": this.getMonth() + 1, //月份 
        "d+": this.getDate(), //日 
        "h+": this.getHours(), //小时 
        "m+": this.getMinutes(), //分 
        "s+": this.getSeconds(), //秒 
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
        "S": this.getMilliseconds() //毫秒 
    };
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o)
    if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
}